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Transfer Belt Crack Detection Based on Image Processing

Author: WeiXia
Tutor: HeXiaoGang
School: Taiyuan University of Technology
Course: Control Theory and Control Engineering
Keywords: Belt crack detection Image processing D entropy segmentation To bridge and Recovery Characteristic parameter extraction
CLC: TP274
Type: Master's thesis
Year: 2011
Downloads: 102
Quote: 0
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Abstract


Rubber belt conveyor is widely used by many large mines coal handling equipment , conveyor belt is the most important coal bearing body , conveyor belt tear once will not only safe production a tremendous threat , and give a huge production units economic losses. Therefore, early prevention tape tear , small crack detection on a conveyor , has important theoretical and practical engineering significance . Based on the analysis on the basis of the practical application environment of coal conveyor , designed to be collecting conveyor belt crack images CCD camera calibration model calibration object based on coplanar points , a CCD camera calibration of the internal and external parameters for the acquisition of the conveyor belt crack do to prepare for low conveyor belt crack image contrast , the presence of noise interference , first crack image acquisition to image enhancement processing . On this basis , the improvement of the more real-time two-dimensional maximum entropy threshold segmentation fast algorithm , to obtain the gray level of the minimum and maximum gray value through the neighborhood average gray value of the one-dimensional gray histogram , the circular scan range is compressed to a minimum and the maximum gradation value , shortening the running time of the algorithm , to better meet the system requirements for real-time from the original grayscale region . For the crack image segmentation there may be a fracture , and crack image itself, there may be overlap , a method based on mathematical morphology , structural elements to construct a different direction , the crack occurred overlap separation ; the constructor left oblique and right oblique 45 . Two structural elements of the direction of the fracture crack bridging the restoration and bridge the crack , the experiments prove that the length and width of the bridge the recovery process the crack image with the original crack the binary image of the infinite approximation for the accurate calculation after cracks characteristic parameters to prepare. Area parameter of the crack region is calculated without considering the direction of the crack , the method is relatively simple. However , due to the different direction of the crack length and width define different when calculating the crack length and width parameters of the established coordinate system , from a mathematical point of rotation crack image , so as to facilitate the obtaining arbitrary direction length and width of cracks . The experiments show that the algorithm has a good adaptability to achieve a higher accuracy .

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CLC: > Industrial Technology > Automation technology,computer technology > Automation technology and equipment > Automation systems > Data processing, data processing system
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